package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;

   // 新增菜品和对应的口味

    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {

        Dish dish = new Dish();

        BeanUtils.copyProperties(dishDTO, dish);

        //向菜品表插入1条数据
        dishMapper.insert(dish);//后绪步骤实现

        //获取insert语句生成的主键值
        Long dishId = dish.getId();

        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);//后绪步骤实现
        }
    }

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);//后绪步骤实现

        return new PageResult(page.getTotal(), page.getResult());

    }
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Override

        @Transactional
        //事务
        public void deleteBatch(List<Long> ids) {
            //判断当前菜品是否能够删除---是否存在起售中的菜品？？
            for (Long id : ids) {
                Dish dish = dishMapper.getById(id);//后绪步骤实现
                if (dish.getStatus() == StatusConstant.ENABLE) {
                    //当前菜品处于起售中，不能删除
                    throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
                }
            }

            //判断当前菜品是否能够删除---是否被套餐关联了？？
            List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
            if (setmealIds != null && setmealIds.size() > 0) {
                //当前菜品被套餐关联了，不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
            }

            //删除菜品表中的菜品数据
            for (Long id : ids) {

            }
        }

    @Override
    public DishVO getByIdWithFlavor(Long id) {

        //根据id查询菜品数据
        Dish dish = dishMapper.getById(id);

        //根据菜品id查询口味数据
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);//后绪步骤实现

        //将查询到的数据封装到VO
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavors);

        return dishVO;
    }
//根据id修改菜品基本信息和对应的口味信息
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
//        修改菜品表基
        dishMapper.update(dish);

        //删除原有口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
//          重新插入口味信息
        List<DishFlavor> flavors = dishDTO.getFlavors();

      if (flavors != null && flavors.size() > 0){


          flavors.forEach(dishFlavor -> {

              dishFlavor.setDishId(dishDTO.getId());
          });
          //向口味表插入n条数据
          dishFlavorMapper.insertBatch(flavors);
      }

    }

    //      分类id查询菜品
    @Override

    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    //条件查询菜品和口味
    @Override
    public List<DishVO> listWithFlavor(Dish dish) {

        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }
        return dishVOList;
    }

    @Override
    public void startOrStop(Integer status, Long id) {

    }


}


